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Aaban Khatri

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  1. Asked: November 24, 2020In: Class 7 Science

    Explain how soil pollution and soil erosion could be prevented.

    Aaban Khatri
    Added an answer on November 24, 2020 at 5:02 am

    Prevention of Soil Pollution: • Use manures instead of chemical fertilizers. • Industrial waste should be treated before release. • Avoid use of polythene and plastic or they should not get mixed in soil. Prevention of Soil Erosion: • Afforestation: large scale planting in place of cut down forests.Read more

    Prevention of Soil Pollution:
    • Use manures instead of chemical fertilizers.
    • Industrial waste should be treated before release.
    • Avoid use of polythene and plastic or they should not get mixed in soil.
    Prevention of Soil Erosion:
    • Afforestation: large scale planting in place of cut down forests.
    • Avoiding over-grazing of grass lands.
    • Use of step-farming in hill regions.

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  2. Asked: November 24, 2020In: Class 7 Science

    Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.

    Aaban Khatri
    Added an answer on November 24, 2020 at 5:01 am

    Rate of percolation= Amount of water (ml) / Percolation time (minutes) = 200 ml / 40 min = 5 ml / min https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

    Rate of percolation= Amount of water (ml) / Percolation time (minutes) = 200 ml / 40 min = 5 ml / min

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

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  3. Asked: November 24, 2020In: Class 7 Science

    List the differences between clayey soil and sandy soil.

    Aaban Khatri
    Added an answer on November 24, 2020 at 4:59 am

    Clayey soil: 1. Ratio of fine particles is higher. 2. Soil retains water and becomes sticky and wet. 3. Suitable for crops like paddy, wheat and gram. 4. Difficult to plough when wet. Sandy soil. 1. Ratio of large particles is higher. 2. Loose particles, air permeate through the soil. 3. Suitable foRead more

    Clayey soil:
    1. Ratio of fine particles is higher.
    2. Soil retains water and becomes sticky and wet.
    3. Suitable for crops like paddy, wheat and gram.
    4. Difficult to plough when wet.
    Sandy soil.
    1. Ratio of large particles is higher.
    2. Loose particles, air permeate through the soil.
    3. Suitable for vegetables, peanuts and cotton cultivation.
    4. Dries up easily. Cannot retain water.

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  4. Asked: November 24, 2020In: Class 7 Science

    How is clayey soil useful for crops?

    Aaban Khatri
    Added an answer on November 24, 2020 at 4:56 am

    Clayey soil is rich in humus and are very fertile, so it is suitable for growing cereals like wheat and gram. Such soil is good at retaining water. For paddy, soils rich in clay and organic matter and having a good capacity to retain water are ideal. For lentils (masoor) and other pulses, loamy soilRead more

    Clayey soil is rich in humus and are very fertile, so it is suitable for growing cereals like wheat and gram. Such soil is good at retaining water.
    For paddy, soils rich in clay and organic matter and having a good capacity to retain water are ideal. For lentils (masoor) and other pulses, loamy soils, which drain water easily, are required.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

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  5. Asked: November 24, 2020In: Class 7 Science

    Explain how soil is formed.

    Best Answer
    Aaban Khatri
    Added an answer on November 24, 2020 at 4:56 am

    Soil is formed by weathering of rocks. Weathering is the breakdown of rocks by the action of air, wind and water. Soil formation is a slow process. It occurs all the time. Soil formation is a two-step process: • Weathering of rocks takes place. Rock is broken down into small particles. • These smallRead more

    Soil is formed by weathering of rocks. Weathering is the breakdown of rocks by the action of air, wind and water. Soil formation is a slow process. It occurs all the time. Soil formation is a two-step process:
    • Weathering of rocks takes place. Rock is broken down into small particles.
    • These small particles mix with humus (organic matter) and form soil.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

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  6. Asked: November 24, 2020In: Class 7 Science

    The water holding capacity is the highest in

    Aaban Khatri
    Added an answer on November 24, 2020 at 4:54 am

    (ii) clayey soil https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

    (ii) clayey soil

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

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  7. Asked: November 24, 2020In: Class 7 Science

    In addition to the rock particles, the soil contains

    Aaban Khatri
    Added an answer on November 24, 2020 at 4:54 am

    (iii) minerals, organic matter, air and water. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

    (iii) minerals, organic matter, air and water.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

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  8. Asked: November 24, 2020In: Class 7 Science

    In addition to the rock particles, the soil contains

    Aaban Khatri
    Added an answer on November 24, 2020 at 4:53 am

    In addition to the rock particles, the soil contains https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

    In addition to the rock particles, the soil contains

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-9/

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  9. Asked: November 24, 2020In: CBSE

    What would be the CBSE Exam 2020-2021 Date Sheet for Class 10 and 12?

    Aaban Khatri
    Added an answer on November 24, 2020 at 4:51 am

    March

    March

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